practice_exam_FINAL%20EXAM_B_W06

practice_exam_FINAL%20EXAM_B_W06 - 1 CHEM 162A FINAL EXAM...

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1 CHEM 162A FINAL EXAM Winter Qtr 2006 Monday, March 13, 2006 Name: TA Section: Student Number: TA Name: Score (page) 2______, 3______, 4______, 5_____ 6_____ 7 _______ 8_________ Score (page) 9______, 10______, 11______, 12_______ 13 ________ TOTAL __________ The periodic table and other information are provided as a separate sheet for your convenience. ANSWER ALL QUESTIONS AND WHERE NECESSARY SHOW YOUR WORK B
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2 Part I. (100 points) 1. (4 points) Which two group 5A elements are semiconductors? a) Bi and Sb b) P and As c) P and Sb d) As and Sb e) none of these 2. (6 points) (i) Give the Lewis structure of sulfur trioxide (SO 3 ) : (ii) The oxidation state of sulfur in SO 3 is: _________ (iii) (3 points) Write a balanced equation for the reaction of gaseous SO 3 with liquid water: 3. (4 points) The group 7A element with the largest electronegativity: a) F b) Cl c) Br d) I e) At 4. (6 points) (i) Commercially, oxygen is produced from what source ________________and how ____________________________________? (ii) True or false : oxygen is the most abundant (by mass percent) element in the human body. __________ 5. (4 points) The VSEPR predicted geometry of xenon hexafluoride, XeF 6 is: a) octahedral b) tetrahedral c) trigonal bipyramid d) linear e) none of the above
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3 6. (4 points) According to the VSEPR model, one of these pental halides of group 5A is unstable and does not exist, which is it? a) PF 5 b) PCl 5 c) SbCl 5 d) AsF 5 e) NCl 5 7. (5 points) Most explosives, such as trinitrotoluene (TNT) with formula C 7 H 5 N 3 O 6 , are made from molecules containing nitrogen atoms. Why? 8. (10 points) Consider the coordination compound, K 3 [Fe(CN) 6 ]. a. Give its name: _________ _________ ___________ ________________ b. Give the oxidation state of iron (Fe) : _________ c. Give the electron configuration of Fe ion: ___________ d. Give the hybridization of Fe: ____________ e. Give the number of unpaired electrons in the compound: _________ 9. (6 points) (a) Name the following coordination compounds. i. [Co(NH 3 ) 4 (NO 2 ) 2 ] 2 SO 4 ii. [Ru(NH 3 ) 5 H 2 O]I 3 (b) Give the formula for the coordination compounds: i. Potassium hexachloroplatinate ( ІІ ) ii. Bis(ethylenediamine)dicyano iron (III) sulfate
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4 10. (8 points) Consider the coordination complex, [Co(CN) 4 ]K 2 i. Give the crystal field diagram for this compound ii. Give the number of unpaired electrons: _________ iii. Give the hybridization of Co ion: _________ 11. (4 points) True or false : To successfully apply the molecular orbital model to describe the bonding of metal ion complexes, e.g. ML
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This note was uploaded on 04/14/2009 for the course CHEM 162 taught by Professor N. during the Spring '08 term at University of Washington.

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practice_exam_FINAL%20EXAM_B_W06 - 1 CHEM 162A FINAL EXAM...

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